Prime Minister David Cameron discussed the 2003 extradition treaty with U.S. President Barack Obama and called for changes in the treaty to benefit both countries.

The request fololowing the case of Kent-based businessman,Christopher Tappin, who was extradited at the request of the United States to face charges of supplying Iran with motors for military use.

The request for discussions came after Home Secretary Theresa May had authorized the extradition of another Briton, Richard O' Dwyer. The 23-year old was wanted in the United States for copyright violations and would be tried in the U.S., reported Guardian.

Critics of the extradition treaty feel that the legislation is lopsided in favour of America which needs to provide far less evidence when compared to the UK. The Parliament Committee on Human Rights had exerted pressure on Cameron to discuss the issue with Obama, according to BBC.

The extradition treaty has garnered a lot of attention ever since it was signed.

In an earlier instance, David Bermingham, Giles Darby and Gary Mulgrew (the NatWest 3, as the trio is known as), were accused of making an illegal $7.3m (£4.6m) profit from a deal with Enron, the energy giant that collapsed amid allegations of fraud in 2001. The men were extradited and had to suffer a 37-month sentence in the U.S. All three had denied the charges levelled against them.